I am looking for an R solution (or a general logic solution) to convert Drosophila melanogaster gene ids into Homo sapiens gene ids. Using R/BiomaRt is problematic, due to the ever-changing nature of the BiomaRt dataset, and its dependence on an internet connection and server status.
The gene ids are in the FlyBase format, but I also have human-friendly gene symbols, e.g.
FBgn0259938 cwo
FBgn0036285 toe
FBgn0264490 Eip93F
FBgn0034903 sona
Any idea? Thanks!